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Roller Kelly Bushing

    The roller kelly bushing is the main tool allocated for drilling equipments, and available with different specifi cations according to different kelly sizes,there are also different types in each specifi cation : which are light and heavy type . The roller kelly bushing has two driving methods:four-pin driving and four-direction driving.

Technical parameters and specifi cations

Kelly size Four-pin driving Four-direction driving
in mm Center distance(mm) Diameter (mm) Across side(mm)
3 1/2 88.9 654.05 82.9 332or342
4 1/2 107.95
5 1/2 133.35

Copyright:Mudanjiang Construction Material Petroleum Machinery Co.,Ltd    HEI ICP 11006197 No. -1    Technical support:Mudanjiang excellence network company